.container {
    width: 100vw;
    height: 100vh;
    position: relative;
    background-image: url('http://net.huanmusic.com/gasha/img/%E5%90%AF%E5%8A%A8%E9%A1%B5.png');
}

.button {
    width: 270px;
    height: 75px;
    position: absolute;
    bottom: 240px;
    left: 240px;
    background-image: url('http://net.huanmusic.com/gasha/img/%E5%AE%89%E5%8D%93%E4%B8%8B%E8%BD%BD.png');
}